Improvement in valve-gear for actuating steam and other enginery



waited gt3-125 gaat aan.

I. NQFORRESTER, 0F BRIDGEPORT, CONNECTICUT.

Lemfsglaam No. easiaaamz Jurgen, 1869.

IMPROVEMENT IN I-VALVIl-(Ii-EAZR FOR .ACTUAEIIN' G- STEAM AND O'IIHIER`ENG-INSERT.

The lSchedule referred to in these Letters Patent making part ofthesame.

. tient, have invented a new and useful Improvementin Water andSteam-Engines; and I do hereby declare that the followingis a full,clear, andexact description thereof, which will enable others skilledinthe art -to make and use the same, reference being had to theaccompanying drawing, vforming part of this specification.

The drawing represents a vertical longitudinal section of my improvedengine.

My invention relates to regulating the stroke of the piston of a steam,-water, or other engine; and

It consists in a new and improved arrangement and construction of partsfor effecting the same, as will be hereinafter fully described. y

A, in the drawing, represents the main cylinder;l

l is its valve-chest;

(l, the slide-valve;

a b, the ports;

c, the exhaust port;

l), the piston;

E, the piston-rod; and F,l the water or steam-supply pipe.

G is` a small cylinder, arranged above 0r below thevalve-chcst B.

H is its piston, and

I, the piston-rod. p

This rod I is secured to the slide-valve C, as shown.

J is a small valve-chest, arranged on the cylinder G, communicating withthe same by means of ports d e, and provided with an exhaust-port, j,and with a small slide-valve, K;

AA branch, g, from the pipe F, supplies the valvechest J. y

The rod h, of the valve K, is fastened to a pivoted beam L, which has aprojecting rod,@`, that fits through an arm, j, projecting from the mainpiston-rod E.

A shoulder, l, is formed on the upper end of the rod "i, and a spring,m, is interposed.l between the arm j and the upper and lower ends of therod @'said springs being fitted loosely'upon the rod i, as shown.

.It will be readily seen, that when, for example, the valve C is raisedto open the port b, and when,'conse quently, the piston is movingupward, the arm 7' of the piston-rod E will,3 at the 'en`d of the upwardmotion, strike the shoulder l, and will elevate the inner end of thebeam L. thereby lowering the valve K.

ing down also the slide C, which opens the port a and letsthepstonvdesoenrl.

The sprngsm m are interposed between the setting-arm and the shoulderoperated by it, mainly to gain time for setting thc valves, while thepiston is completing its stroke, and also to prevent any jarring valve Cis made certain, and the action of the piston reliable.

rlhe machine illustrated in the drawing, is more especially intended asahydraulic organ-blower; but .the same system can be applied to all othermachinery, whether driven by water, steam, air, or other liquid or uid,and which may be used for suitable purposes.

Having thus described Iny invention,

What I claim as new, and desire to secure by Letters Patent, is-

The arrangement of the rod i, provided with the adjustable collar l andsprings m,and 'the setting adjustable arm j, with relation to eachother, andthe beam L, valve K, piston H, valvev C, and piston D,constructed substantially as herein shown and described.

I. N. FORRESTER.

Witnesses:

F. W. SMITH, Jr., J As. WAITING.

The upper port el of the cylinder G is thus opened, andthe piston H iscaused to nuove downward, carry

